105 lines
3.4 KiB
C
105 lines
3.4 KiB
C
/*
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* Copyright 2008-2013 Various Authors
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* Copyright 2004-2005 Timo Hirvonen
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef CMUS_WINDOW_H
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#define CMUS_WINDOW_H
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#include "iter.h"
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/*
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* window contains list of rows
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* - the list is double linked circular list
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* - head contains no data. head is not a real row
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* - head->prev gets the last row (or head if the list is empty) in the list
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* - head->next gets the first row (or head if the list is empty) in the list
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*
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* get_prev(&iter) always stores prev row to the iter
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* get_next(&iter) always stores next row to the iter
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*
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* these return 1 if the new row is real row (not head), 0 otherwise
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*
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* sel_changed callback is called if not NULL and selection has changed
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*/
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struct window {
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/* head of the row list */
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struct iter head;
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/* top row */
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struct iter top;
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/* selected row */
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struct iter sel;
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/* window height */
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int nr_rows;
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unsigned changed : 1;
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/* return 1 if got next/prev, otherwise 0 */
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int (*get_prev)(struct iter *iter);
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int (*get_next)(struct iter *iter);
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/* NULL if all rows are selectable */
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int (*selectable)(struct iter *iter);
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void (*sel_changed)(void);
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};
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struct window *window_new(int (*get_prev)(struct iter *), int (*get_next)(struct iter *));
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void window_free(struct window *win);
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void window_set_empty(struct window *win);
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void window_set_contents(struct window *win, void *head);
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/* call this after rows were added to window or order of rows was changed.
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* top and sel MUST point to valid rows (or window must be empty, but then
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* why do you want to call this function :)).
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*
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* if you remove row from window then call window_row_vanishes BEFORE removing
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* the row instead of this function.
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*/
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void window_changed(struct window *win);
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/* call this BEFORE row is removed from window */
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void window_row_vanishes(struct window *win, struct iter *iter);
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int window_get_top(struct window *win, struct iter *iter);
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int window_get_sel(struct window *win, struct iter *iter);
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int window_get_prev(struct window *win, struct iter *iter);
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int window_get_next(struct window *win, struct iter *iter);
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/* set selected row */
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void window_set_sel(struct window *win, struct iter *iter);
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void window_set_nr_rows(struct window *win, int nr_rows);
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void window_up(struct window *win, int rows);
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void window_down(struct window *win, int rows);
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void window_goto_top(struct window *win);
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void window_goto_bottom(struct window *win);
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void window_page_up(struct window *win);
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void window_half_page_up(struct window *win);
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void window_page_down(struct window *win);
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void window_half_page_down(struct window *win);
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void window_scroll_down(struct window *win);
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void window_scroll_up(struct window *win);
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void window_page_top(struct window *win);
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void window_page_bottom(struct window *win);
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void window_page_middle(struct window *win);
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int window_get_nr_rows(struct window *win);
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#endif
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